Back in the late 1950’s, it wasconclusively seen that potting yourcircuits in epoxy in no manner offersany design secrecy whatsoever. Infact, epoxy potting will always havethe exact opposite effect.First, any reasonably good designengineer could select a "black box"approach and carefully look at theinputs and the outputs of the circuit.From the circuit’s size, cost, and frombeing aware of trade journals, databooks, distributor’s catalogs, and apnotes, they can easily come up withthree or four methods to provide thesame function.At least one of which will end upfar cheaper, better, and more creativethan yours.